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Updated arithmetic implementations to deal with corner cases whichy run out of WHILE loops.

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Edward Diener
2020-06-09 20:54:12 -04:00
parent d41d1dda97
commit 13c9669410
6 changed files with 80 additions and 28 deletions
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13
include/boost/preprocessor/arithmetic/sub.hpp
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@ -19,12 +19,15 @@
# include <boost/preprocessor/control/iif.hpp>
# include <boost/preprocessor/control/while.hpp>
# include <boost/preprocessor/facilities/identity.hpp>
# include <boost/preprocessor/logical/and.hpp>
# include <boost/preprocessor/logical/bitor.hpp>
# include <boost/preprocessor/tuple/elem.hpp>
# include <boost/preprocessor/arithmetic/detail/is_maximum_number.hpp>
# include <boost/preprocessor/arithmetic/detail/is_minimum_number.hpp>
#
# /* BOOST_PP_SUB */
#
# define BOOST_PP_SUB(x, y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_IDENTITY_N(0,2),BOOST_PP_SUB_DO)(x,y)
# define BOOST_PP_SUB(x, y) BOOST_PP_IIF(BOOST_PP_BITOR(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_DETAIL_IS_MINIMUM_NUMBER(x)),BOOST_PP_IDENTITY_N(0,2),BOOST_PP_SUB_DO)(x,y)
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
# define BOOST_PP_SUB_DO(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))
@ -33,7 +36,7 @@
# define BOOST_PP_SUB_I(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))
# endif
#
# define BOOST_PP_SUB_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)
# define BOOST_PP_SUB_P(d, xy) BOOST_PP_AND(BOOST_PP_TUPLE_ELEM(2, 1, xy),BOOST_PP_TUPLE_ELEM(2, 0, xy))
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
# define BOOST_PP_SUB_O(d, xy) BOOST_PP_SUB_O_I xy
@ -45,12 +48,12 @@
#
# /* BOOST_PP_SUB_D */
#
# define BOOST_PP_SUB_D(d, x, y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_IDENTITY_N(0,3),BOOST_PP_SUB_D_DO)(d,x,y)
# define BOOST_PP_SUB_D(d, x, y) BOOST_PP_IIF(BOOST_PP_BITOR(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_DETAIL_IS_MINIMUM_NUMBER(x)),BOOST_PP_IDENTITY_N(0,3),BOOST_PP_SUB_DO_D)(d,x,y)
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
# define BOOST_PP_SUB_D_DO(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))
# define BOOST_PP_SUB_DO_D(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))
# else
# define BOOST_PP_SUB_D_DO(d, x, y) BOOST_PP_SUB_D_I(d, x, y)
# define BOOST_PP_SUB_DO_D(d, x, y) BOOST_PP_SUB_D_I(d, x, y)
# define BOOST_PP_SUB_D_I(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))
# endif
#